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Iranian Journal of Basic Medical Sciences، جلد ۱۶، شماره ۱۱، صفحات ۱۱۸۱-۱۱۸۹
عنوان فارسی
چکیده فارسی مقاله
کلیدواژه‌های فارسی مقاله
عنوان انگلیسی A New Approach for Scatter Removal and Attenuation Compensation from SPECT/CT Images
چکیده انگلیسی مقاله Objective(s): In SPECT, the sinogram contains scatter and lack of attenuated counts that degrade the reconstructed image quality and quantity. Many techniques for attenuation and scatter correction have been proposed. An acceptable method of correction is to incorporate effects into an iterative statistical reconstruction. Here, we propose new Maximum Likelihood Expectation Maximization (MLEM) formula to correct scattering and attenuating photons during reconstruction. Materials and Methods: In this work, scatters are estimated through Klein-Nishina formula in all iterations and CT images are used for accurate attenuation correction. Reconstructed images resulted from different MLEM reconstruction formula have been compared considering profile agreement, contrast, mean square error, signal-to-noise ratio, contrast-to-noise ratio and computational time. Results: The proposed formula has a good profile agreement, increased contrast, signal-to-noise (SNR) & contrast-to-noise ratio (CNR), computational time and decreased mean square error (MSE) compared with uncorrected images and/or images from conventional formula. Conclusion: In conclusion, by applying the proposed formula we were able to correct attenuation and scatter via MLEM and improve the image quality, which is a necessary step for both qualitative and quantitative SPECT images.
کلیدواژه‌های انگلیسی مقاله Attenuation correction MLEM Scatter correction SPECT
نویسندگان مقاله شبنم علومی | shabnam oloomi
department of medical physics, mashhad university of medical science, mashhad, iran


هادی نوری اسکندری | hadi noori eskandari
department of applied mathematics, school of mathematical sciences, ferdowsi university of mashhad, mashhad, iran

سازمان اصلی تایید شده: دانشگاه فردوسی (Ferdowsi university)

سید رسول زکوی | seyed rasoul zakavi
nuclear medicine research center, imam reza hospital, faculty of medicine, mashhad university of medical sciences, mashhad, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی مشهد (Mashhad university of medical sciences)

پیتر knoll | peter knoll
department of nuclear medicine wilhelminenspital vienna, austria


فراز کلانتری | faraz kalantari
research center for nuclear medicine, tehran university of medical sciences, tehran, iran

سازمان اصلی تایید شده: دانشگاه علوم پزشکی تهران (Tehran university of medical sciences)

محسن حاجی زاده صفار | mohsen hajizadeh saffar
department of medical physics, mashhad university of medical science, mashhad, iran
نشانی اینترنتی http://ijbms.mums.ac.ir/article_1936.html
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زبان مقاله منتشر شده en
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نوع مقاله منتشر شده Original Article
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